from __future__ import annotations

from datetime import datetime

from sqlalchemy import DateTime, ForeignKey, Integer, LargeBinary, String, func
from sqlalchemy.orm import Mapped, mapped_column

from ..core.db import Base


class DeviceBackup(Base):
    __tablename__ = "device_backups"

    id: Mapped[int] = mapped_column(Integer, primary_key=True)
    device_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("devices.id", ondelete="CASCADE"), index=True, nullable=False
    )
    filename: Mapped[str] = mapped_column(String(255), nullable=False)
    # 'binary' (.backup) или 'text' (.rsc)
    fmt: Mapped[str] = mapped_column(String(16), nullable=False)
    size: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
    content: Mapped[bytes] = mapped_column(LargeBinary, nullable=False)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), nullable=False
    )